The _________ is the supportive frame of the microscope that joins the body tube to the base. When it comes to lighting, it's a good practice to shut off the light when not in use. There are several type of microscopes, mainly, the one that we use in lab is a simple light microscope or a compound microscope. The type of microscope I used in the lab is a ________ _____ __________. One hand should grab Turn on the microscope light. _________ ______ focus and magnify light coming through the slide. In the Microscopy lab, you will examine a chicken intestine slide that is specially prepared for a transmission electron microscope. In general, the diameter of microorganisms ranges from 0.2 - 2.0 microns. The type of microscope that we will be using in this lab is a compound light microscope. The term __________ can be translated as, "to view the tiny". A . Doing so could _____ the slide or the __________. 3. This type of microscope uses visible light focused through two lenses, the ocular and the objective, to view a small specimen. being able to see adjacent objects as separate. BIOLOGY I – Labs 4 and 5: Microscope / Cell Structure Compound Light Microscope (LM) • It has multiple lenses and uses visible light as the source of illumination. LAB 3 – Use of the Microscope Introduction In this laboratory you will be learning how to use one of the most important tools in biology – the compound light microscope – to view a variety of specimens. What must be done when using a microscope. distance from either side of the image through the center, which is dependent on magnification. • The image from the objective lens is remagnified by the ocular lens. We also experimented with different powers of magnifications on the microscope and discovered how to measure the size of … Start with a high power objective lens when focusing. Answer the questions at the end of the lab exercise. The _________ is the eyepiece where you place your eyes to observe the specimen. if true, write t on the answer blank. In focusing on a specimen under the microscope, you must. The light microscope can be divided into six sub-categories. Images observed under the light microscope are reversed and inverted. Microscopes are used to study thing that are too _____ to be easily observed by other methods. Dashboard. The ______ ____ magnifies the image produced by the objective lens. False - it is easiest to initially focus using the lowest power magnification as a large portion of the specimen will be in the field of view. The light microscope bends a beam of light at the specimen using a series of lenses to provide a clear image of the specimen to the observer. Try out the electron microscope. Microscopes are tools used to enlarge images of small objects so as they can be studied. ______ __________ moves the stage up and down a large amount for coarse focus. _____ use the ______ adjustment when using ____ power. You … They are less powerful than alternatives like electron microscopes but also much cheaper and more practical for casual use. At higher magnification the light intensity should be decreased so that the image will have good contrast. • Total magnification of a specimen = To examine part of the specimen at higher magnification, move that part of the specimen off to the side. Parts fo the Compound Microscope (2 of 2), Parts fo the Compound Microscope (1 of 2). The slide may either be a ________ slide that is permanent and was purchased a science supply company. Electron microscopes can be used to visualize objects that are too small to see when using a light microscope—for example the microvilli, mitochondria and the junctions between cells. The virtual image being viewed through the ocular lenses is, inverted and opposite of the real image being emitted into the objective lens, If the image through a microscope appears to be moving to the left. The term _____ can be translated as, "to view the tiny". It is important to lift them from the cabinet with the use of two hands. amount of space between the upper surface of the glass slide and the lowest part of the objective lens. if false, correct the statement by writing on the blank the proper word or phrase to replace the one that is underlined. Always use low magnification during your initial observation. high power, always, field of view, fine, focus. Always remember that a microscope is an _________, _________ instrument that should be handled carefully. ____ __________ moves the stage up and down a tiny amount for fine focus. • Visible light is passed through a specimen and then through glass lenses that magnify the image. What must be done when using a microscope Carry the microscope with two hands, one on the arm and the other on the base. Completely unwrap the electrical cord before plugging in the microscope. Only objects 0.1mm and larger can be visualized by the human eye. Before switching to ____ _____, you should ______ position the specimen in the center of the _____ __ ____ and use the ____ adjust to sharpen the _____ of the image. Your grade for the lab 1 report (1A and 1B combined) will be the fraction of correct responses on a 50 point scale[(# correct/# total ) x 50]. The purpose of this lab was to discover how to use and take care of a compound microscope. Another microscope that you will use in lab is a stereoscopic or a dissecting microscope. A microscope is one of the invaluable tools in the laboratory setting. What are the two ways the brightness or light intensity can be lowered. 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